Coal-mining machine.



No. 699,864. Patented May l3, I902.

J. BURTON & W. B. LODWICK.

COAL MINING MACHINE.

[Application filed Nov. 12, 1900.)

(No Model.) 3 Sheets-Sheet I.

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No. 699.864. Patented May l3, I902. J. BURTON 81. W. B.-LUUW|CK. v

COAL MINING MACHINE.

(Application filgd Nov. 12, 1900. (No Model.) I 3 Sheets-Sheet 2.

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No. 699,864. Patented May l3, I902.

J. BURTON & w. B. LODWICK.

COAL MINING MACHINE.

(Application filed Nov. 12, 1900.)

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UNTTED STATES PATENT OFFICE.

JOHN BURTON AND WILLIAM B. LODl/VICK, OF MYSTIC, IOWA.

COAL-MINING MACHINE.

SI- ECIFIGATION forming part of Letters Patent No. 699,864, dated May 13, 1902.

Application filed November 12,1900. Serial No. 36,317. (No model.)

To (all whom it may concern:

Be it known that we, JOHN BURTON and WILLIAM B. LoDwIoK, citizens of the United States, residing at Mystic, in the county of Appanoose and State of Iowa, have invented a new and useful Goal-Mining Machine, of which the following is a specification.

Our invention has relation to improvements in coal-mining machines; and it consists in the construction and arrangement of parts, as will be hereinafter described, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a top View of ourinvention. Fig. 2 is an end View. Fig. 3 is a side view. Fig. 4 are views of the cutting-teeth, showing the construction of same. Fig. 5is abottom View of the frame, showing the eccentric gear-wheels for operating the drive-shaft.

Referring to the drawings, the letter e denotes the framework of our machine, made,

preferably, in rectangular form, having journaled in the side bars or rails thereof a shaft 9, having on one of its outer ends a drive girth on, said slide having stops 1', whereby the bevel gear-wheels c or b are adapted to alternately engage the bevel gear-wheel cl When required, any suitable means may be connected to the slide for operating the same. To the lower end of the worm-shaft e' is secured a cog-gear wheel m (shown in Fig. 1,) which meshes with crank-wheels ff,journaled on stubshaftsff, secured to a crossbar Z of the frame, (shown in Figs. 1 and 3,) and each of said wheels is eccentrically pivoted to the drive-shaft g at f f as shown in Figs. 1 and 3, whereby a longitudinal vertical movement is imparted to the cutter-bar J, which is secured to the drive-shaft g, as

shown in Fig. 1. The outer or free endof the cutter-bar J is curved or rounded and provided with slots formed in the top and edge surfaces thereof.

The letter K, as shown in Fig. 4, represents the teeth of the cutter-bar, each of whichis provided with a head 0 body portions 0 and forked ends 0 the said body portions 0 between the heads 0 and the ends 0 and provided with cut-away portions a, forming shoulders 0 so that when the teeth are mounted in the slots of the cutter-bar the shoulders 0 will abut against the outer face portions of the cutter-bar, the heads c being secured to the upper face portions thereof by means of bolts 9 or other suitable fastening means.

The letter H represents axles journaled in suitable bearings in the bottom side rails of the frame and having rigidly mounted on the ends thereof toothed wheels 71., which are adapted to travel in the paths of tracks L, having teeth on corresponding to those of said tracks.

The letter designates a horizontally-arranged worm-shaft journal ed at one end in a bearing 12 the opposite end thereof journaled in a suitable bearing of the frame and said end having thereon a gear-wheel m Mounted on the rear axle is a toothed wheelp', (shown in dotted lines, Fig. 3, and also shown in Fig. 2,) which meshes with a worm-shaft p, and by shifting the bevel-gear c in contact with the bevel-gear d by means of the slide S the vertical worm-shaft 2' meshes with the toothed wheel m, which imparts motion to the wormshaft 1), thereby turning the axle H, by means of which the toothed wheels 72. engage the teeth ofthe track and travel therein for the purpose of moving the machine.

In Fig. 1 we show a portion of the teeth connected to the cutter-bar for the purpose of illustration. Those marked in dotted lines indicate the direction each tooth will travel when the cutter-bar is in motion. The tooth marked a: is the first one to out, the preceding ones following in line thereafter. The teeth during the cutting process remove the cuttings from under the same and deposit them outward therefrom.

We wish it-to be understood that our machine may be driven by any wellknown power, preferably by a gasolene-engine.

Having described our invention, what we claim is In a coal-mining machine, the combination with the frame having a rotating shaft with sidewise movable beveled gear Wheels arranged at suitable distances apart thereon, girths arranged one above the other, a slotted slide mounted on the upper girth, a vertical Worm-shaft having its upper end journaled in the upper girth and passing through the slot of the slide, a bevel-gear on said upper end of the worm-shaft, a cog gear-wheel on the lower end thereof meshing with crank-wheels journaled on a cross-bar of the frame, a cutterbar drive shaft, a cutter:- bar with teeth I 5 mounted on the crank-pins of the said crankwheels, whereby a longitudinal and vertical movement is imparted to said cutter-bar, substantially as specified.

In testimony whereof we have signed our 20 names to this specification in the presence of two witnesses.

JOHN BURTON. WM. B. LODWICK.

\Vituesses:

B. E. BROWN, HORACE SILK. 

